hyper acuity


sharpness; acuteness; keenness: acuity of vision; acuity of mind.

1375–1425; late Middle English acuite < Old French < Medieval Latin, Late Latin acuitās, equivalent to Latin acu(ere) to sharpen or acū(tus) sharpened (see acute) + -itās -ity

hyperacuity, noun
nonacuity, noun
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World English Dictionary
acuity (əˈkjuːɪtɪ)
1.  keenness or acuteness, esp in vision or thought
2.  the capacity of the eye to see fine detail, measured by determining the finest detail that can just be detected
[C15: from Old French, from Latin acūtusacute]

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Word Origin & History

1540s, from M.Fr. acuité, from M.L. acuitatem (nom. acuitas) "sharpness," from L. acus "needle," acuere "to sharpen," from PIE base *ak- "rise to a point, be sharp" (see acrid).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

acuity a·cu·i·ty (ə-kyōō'ĭ-tē)
Sharpness, clearness, and distinctness of perception or vision.

The American Heritage® Stedman's Medical Dictionary
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